Record details

Title
    U-Th-rich zircon, thorite and allanite-(Ce) as a main carriers of radioactivity in the highly radioactive ultrapotassic melasyenite porphyry from the Šumava Mts., Moldanubian Zone, Czech Republic
Author
    Sulovský, Petr
    Škoda, Radek
    Žáček, Vladimír
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Journal of Geosciences
Vol./nr.
    Roč. 54, č. 4
Pages
    12
Year
    2009
Thesaurus term
    melasyenite porphyry, radioactivity, zircon, thorite, allanite-(Ce), Moldanubicum, Bohemian Massif
Keyword
    Allanite-(Ce
    Carriers
    Czech
    Highly
    Main
    Melasyenite
    Moldanubian
    Mts
    Porphyry
    Radioactive
    Radioactivity
    Republic
    Šumava
    Thorite
    U-Th-rich
    Ultrapotassic
    Zircon
    Zone
Abstract (in english)
   A melasyenite porphyry from the vicinity of Kašperské Hory (the Šumava Mts., Moldanubian Zone) shows a high natural radioactivity (K = 4.4-6.1 wt. %, eU = 15-24 ppm, eTh = 38-49 ppm). The most important carriers of U and Th are zircon, thorite, allanite-(Ce) and scarce monazite. Most of the zircon and thorite grains are altered by post-magmatic processes of due to which especially the zircon shows a large degree of chemical variability.
Contributor
    Česká geologická služba
Contributor code
    ČGS (RIV)
Source format
    R
Import date
    15. 10. 2014